FrostyTech has posted a Spire 5F271B1L3 Copper Core Heatsink review

The Spire 5F271B1L3 FalconRock II is large socket A heatsink that slims down to a mounting profile of just 60x60mm. The curved shape of the cooler allows a 80mm fan to be attached to the fins so noise levels are kept under control without sacrificing thermals. For some strange reason the 80mm fan Spire have packaged with the FalconRock II is made with a cast-aluminum frame. This isn't altogether shocking since many fans are made with aluminum frames for industrial applications, but it is unique for processor cooling. No explanation is given by Spire for this rather interesting fan-choice, but I think it is safe to say that aluminum-framed fan has essentially no effect on the overall thermal capabilities of the 5F271B1L3 heatsink. What will have an effect on how thermally efficient the FalconRock II proves to be is the small copper disc inserted into the base. If done properly, the copper will ultimately increase the surface area of the heat source enticing quicker transmission to the outer fins more effectively.

Read more